Burton [ak]® Surgence 20L Backpack 2026 - Burton

$31.99 USD

~~$113.99 USD~~ $31.99 USD

Sale Sold out

Color: True Black

Size: OS OS

Versatile and technical with organized storage and vest like shoulder straps.

Why carry more than you need when you can keep it simple with the Burton [ak] Surgence 20L Backpack. Day hike or quick-hit adventure, load up a warm layer, snacks, water, and the tech you need for a summit scramble. Its vest-like shoulder straps put all the high-use stuff like your phone and snacks right at your fingertips. Multiple adjustability points let you fine-tune comfort for a free-moving feel.

Easy Access to the Little Stuff
Vest-like shoulder straps put all the little stuff like sunscreen, phone, and snacks within easy reach.
Just the Right Size
20-liter size is just right for quick hits and short tours without being too bulky for the chairlift.
Fits and Feels Great
A mesh back panel and multiple adjustment points make sure it fits and feels great all day long.
Low Environmental Impact
Bluesign® approved materials reduce impact on humans and the planet during manufacturing.

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Size Chart

Women's Size Chart

Outerwear & Apparel

Size	XXS	XS	S	M	L	XL	XXL	3XL
Numeric Size	00	0-2	4-6	8-10	12-14	16	18	20
Arm (in)	30	30-30.5	30.5	31	31	31	31.5	31.5
Arm (cm)	76.5	77	77.5-78	78	78-78.5	79	79.5	80
Chest (in)	29-31	31-33	33-35	35-37	37-39.5	39.5-42.5	42.5-45.5	45.5-49.5
Chest (cm)	74-79	79-84	84-89	89-94	94-100	100-108	108-116	116-126
Natural Waist (in)	22-24	24-26	26-28	28-30	30-33	33-37	37-41	41-45
Natural Waist (cm)	56-61	61-66	66-71	71-76	76-84	84-94	94-104	104-114
Hips (in)	32-34	34-36	36-38	38-40	40-42.5	42.5-45.5	45.5-48.5	48.5-52.5
Hips (cm)	81-86	86-91	91-97	97-102	102-108	108-116	116-123	123-133
Equivalent Men's Size		XXS	XS	S	M	L	XL	XXL
Size	Short	Regular	Tall
Body Inseam/ Inside Leg (in)	30.5	32.5	34.5
Body Inseam/ Inside Leg (cm)	77	83	88

Size	24	25	26	27	28	29	30	31	32
Natural Waist (in)	24-25	25-26	26-27	27-28	28-29	29-30	30-31	31-32.5	32.5-34
Natural Waist (cm)	61-63.5	63.5-66	66-68.5	68.5-71	71-73.5	73.5-76	76-79	79-82.5	82.5-86.5
Hips (in)	34-35	35-36	36-37	37-38	38-39	39-40	40-41	41-42.5	42.5-44
Hips (cm)	86-89	89-91	91-94	94-97	97-99	99-102	102-104	104-108	108-112

Gender Neutral

Size	XXS	XS	S	M	L	XL	XXL	3XL
Equivalent Women's Size	XS	S	M	L	XL	XXL	3XL
Equivalent Men's Size	XXS	XS	S	M	L	XL	XXL	3XL
Arm (in)	32	32-32.5	32.5-33	33	33.5	33.5-34	34-35	35
Arm (cm)	81.5	81.5-82	82.5-84	84-84.5	84.5-85.5	85.5-86.5	86.5-88.5	88.5-89.5
Chest (in)	32 - 34	34 - 36.5	36.5-39	39-41	41-43	43 - 46	46 - 50	50-54
Chest (cm)	81-86	86-93	93-99	99-104	104-109	109-117	117-127	127-137
Natural Waist (in)	27-29	29-31	31 - 33	33- 35	35-37	37-40	40 - 44	44-51
Natural Waist (cm)	69-74	74-79	79-84	84-89	89-94	94-102	102-112	112-130
Hips (in)	33.5-35.5	35.5-37	37-38.5	38.5-40.5	40.5-42.5	42.5-45.5	45.5-49.5	49.5-52.5
Hips (cm)	85-90	90-94	94-98	98-103	103-108	108-116	116-126	126-133

Snowboard Boots

Women's US	4	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11
Men's US							6.5	7	7.5	8	8.5	9	9.5	10
Kids' & Toddler	3K	4K	4.5K	5K	5.5K	6K		7K
EURO	34	35	36	36.5	37	38	39	40	40.5	41	41.5	42	42.5	43
UK	2	3	3.5	4	4.5	5	5.5	6	6.5	7	7.5	8	8.5	9
Mondo	21	22	22.5	23	23.5	24	24.5	25	25.5	26	26.5	27	27.5	28
CN (2.5)				230	235	240	245	250	255	260	265	270	275	280
CN (1.5)	210	220	225	230	235	240	245	250	255	260	265	270	275	280
CN (2)	210	220		230		240		250

Snowboard Bindings

Binding Size	S	M	L
Women's Boot Size	4-6	6-8	8+
Men's Boot Size		6-7	7-10
EURO Boot Size	34-36.5	36.5-40	40+
UK Boot Size	2.5-4	4-6	6+
Mondo Boot Size	21-23	23-25	25+

Men's Size Chart

Outerwear & Apparel

Size	XXS	XS	S	M	L	XL	XXL	3XL
Arm (in)	32	32-32.5	32.5-33	33	33.5	33.5-34	34-35	35
Arm (cm)	81.5	81.5-82	82.5-84	84-84.5	84.5-85.5	85.5-86.5	86.5-88.5	88.5-89.5
Chest (in)	32 - 34	34 - 36.5	36.5-39	39-41	41-43	43 - 46	46 - 50	50-54
Chest (cm)	81-86	86-93	93-99	99-104	104-109	109-117	117-127	127-137
Natural Waist (in)	27-29	29-31	31 - 33	33- 35	35-37	37-40	40 - 44	44-51
Natural Waist (cm)	69-74	74-79	79-84	84-89	89-94	94-102	102-112	112-130
Hips (in)	33.5-35.5	35.5-37	37-38.5	38.5-40.5	40.5-42.5	42.5-45.5	45.5-49.5	49.5-52.5
Hips (cm)	85-90	90-94	94-98	98-103	103-108	108-116	116-126	126-133
Equivalent Women's Size	XS	S	M	L	XL	XXL	3XL
Garment Inseam	Short	Regular	Tall
Body Inseam/ Inside Leg (in)	30.5	32.5	34.5
Body Inseam/ Inside Leg (cm)	77	83	88

Size	28	29	30	31	32	33	34	35	36	38
Natural Waist (in)	29-30	30-31	31-32	32-33	33-34	34-35	35-36	36-37	37-38	38-40
Natural Waist (cm)	74-76	76-79	79-81	81-84	84-86.5	86.5-89	89-91.5	91.5-94	94-96.5	96.5-102
Hips (in)	35.5-36.5	36.5-37	37-38	38-38.5	38.5-39.5	39.5-40.5	40.5-41.5	41.5-42.5	42.5-43.5	43.5-45.5
Hips (cm)	90-93	93-94	94-97	97-98	98-100	100-103	103-105	105-108	108-110	110-116

Gender Neutral

Size	XXS	XS	S	M	L	XL	XXL	3XL
Equivalent Women's Size	XS	S	M	L	XL	XXL	3XL
Equivalent Men's Size	XXS	XS	S	M	L	XL	XXL	3XL
Arm (in)	32	32-32.5	32.5-33	33	33.5	33.5-34	34-35	35
Arm (cm)	81.5	81.5-82	82.5-84	84-84.5	84.5-85.5	85.5-86.5	86.5-88.5	88.5-89.5
Chest (in)	32 - 34	34 - 36.5	36.5-39	39-41	41-43	43 - 46	46 - 50	50-54
Chest (cm)	81-86	86-93	93-99	99-104	104-109	109-117	117-127	127-137
Natural Waist (in)	27-29	29-31	31 - 33	33- 35	35-37	37-40	40 - 44	44-51
Natural Waist (cm)	69-74	74-79	79-84	84-89	89-94	94-102	102-112	112-130
Hips (in)	33.5-35.5	35.5-37	37-38.5	38.5-40.5	40.5-42.5	42.5-45.5	45.5-49.5	49.5-52.5
Hips (cm)	85-90	90-94	94-98	98-103	103-108	108-116	116-126	126-133

Snowboard Boots

Men's US	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11	11.5	12	13	14	15
Women's US	7	7.5	8	8.5	9	9.5	10	10.5	11
EURO	38	39	40	40.5	41	41.5	42	42.5	43	43.5	44	44.5	45	46	47	48
UK	5	5.5	6	6.5	7	7.5	8	8.5	9	9.5	10	10.5	11	12	13	14
Mondo	24	24.5	25	25.5	26	26.5	27	27.5	28	28.5	29	29.5	30	31	32	33
CN (2.5)	240	245	250	255	260	265	270	275	280	285	290	295	300	310	320	330
CN (1.5)	240	245	250	255	260	265	270	275	280	285	290	x
CN (2)	240	x	250

Snowboard Bindings

Binding Size	S	M	L
Men's Boot Size	6-8	8-11	10+
Women's Boot Size	5-9	9-11	11+
EURO Boot Size	38-41	41-44	43+
UK Boot Size	5-7	7-10	9+
Mondo Boot Size	24-26	26-29	28+

Kids' Size Chart

Infant Outerwear & Apparel

Size	3M	6M	9M	12M	18M
Age	0-3 mo.	3-6 mo.	6-9 mo.	9-12 mo.	12-18 mo.
Height (in)	21.5-24	24-26.5	26.5-29	29-31.5	31.5-34
Height (cm)	55-61	61-67	67-74	74-80	80-86
Weight (lbs)	8-13	13-17	17-21	21-25	25-28
Weight (kgs)	4-6	6-8	8-10	10-11	11-13
EU Size	56	62	68	74	80/86

Toddler Outerwear & Apparel

Size	18M	2T	3T	4T	5	XS	S
Age	12-18mo.	2	3	4	5	6-7	8
Height (in)	31.5-34	30-34	34-38	38-42	42-46	46-50	50-54
Height (cm)	80-86	76-86	86-97	97-107	107-117	117-127	127-137
Weight (lbs)	25-28	28-31	31-34	34-38	38-43	43-48	48-68
Weight (kgs)	11-13	13-14	14-15	15-17	17-20	20-22	22-31
Chest (in)	20-20.5	20.5-21	21-21.5	21.5-22.5	22.5-23.5	23.5-24.5	24.5-26.5
Chest (cm)	51-52	52-53.5	53.5-54.5	54.5-57	57-60	60-62	62-67
Natural Waist (in)	18.5-19	19-19.5	19.5-20	20-20.5	20.5-21.5	21.5-22.5	22.5-24.5
Natural Waist (cm)	47-48	48-50	50-51	51-52	52-55	55-57	60-62
EU Size	80/86	92	98	104	110	116/122	128/134

Kids' Outerwear & Apparel

Size	XS	S	M	L	XL
Age	6-7	8	10	12	14-16
Height (in)	46-50	50-54	54-58	58-62	62-66
Height (cm)	117-127	127-137	137-147	147-157	157-168
Weight (lbs)	43-48	48-68	65-87	85-100	90-115
Weight (kgs)	20-22	22-31	29-39	39-45	41-52
Arm (in)	22-23	24	24.5-25	26.5	27.5-29
Arm (cm)	56-58	61	62-63.5	67	70-74
Chest (in)	23.5-24.5	24.5-26.5	26.5-28.5	28.5-31.5	31.5-34.5
Chest (cm)	60-62	62-67	67-72	72-80	80-88
Natural Waist (in)	21.5-22.5	22.5-24.5	24.5-26.5	26.5-28.5	28.5-30.5
Natural Waist (cm)	55-57	60-62	62-67	67-72	72-77
Hips (in)	23.5-25	25-28	28-30.5	30.5-33	33-35.5
Hips (cm)	60-64	64-71	71-77	77-84	84-90
Body Inseam/ Inside Leg (in)	20-23	24-24.5	25.5-26	27.5	29-31
Body Inseam/ Inside Leg (cm)	51-59	61-62	65-66	70	74-79
EU	116/122	128	140	152	164/166
JPN	120	130	140	150	160

Snowboard Boots

Kids' & Toddler	7C	8C	9C	10C	11C	12C	13C	1K	2K	3K	4K	5K	6K	7K
Men's US														7
Women's US										4	5	6	7	8
EURO	24	25	26	27	28	29	30.5	31.5	33	34	35	36.5	38	40
UK	6	7	8	9	10	11	12	13	1	2	3	4	5	6
Mondo	13.5	14.5	15.5	16.5	17.5	18.5	19.5	20	20.5	21	22	23	24	25
CN (2.5)												230	240	250
CN (1.5)										210	220	230	240	250
CN (2)	135	145	155	165	175	185	195	200	205	210	220	230	240	250

Snowboard Bindings

Binding Size	Mini Grom - Small	Grom - Medium	Smalls - Large
US Boot Size	7C-13C*	1K-3K	4K-7K
EURO Boot Size	24-30.5	31.5-34	35-40
UK Boot Size	6-12	13-2	3-6
MONDO Boot Size	13.5-19.5	20-21	22-25
* C = Toddler Sizing

Helmet

Size	S/M	L/XL
Global Fit (cm)	48-51	52-55
Round Fit (cm)	51-53	53-55

Gloves

Toddler / Kids	2T	3T/4T	5/6	XS	S	M	L	XL
Hand Circumference (in)	5	5.5	6	6.5	7	7.25	7.5	8
Hand Circumference (cm)	12.5	14	15	16.5	18	18.5	19	20.5
Hand Length (in)	3.75	4.25	5	5.25	5.5	5.75	6	6.25
Hand Length (cm)	9.5	11	12.5	13.5	14	14.5	15	16
Age (years)	2	3-4	5-6	7	8	10	12	14-16
EU Size (cm)	12.5	14	15	16.5	18	18.5	19	20.5

Socks

Gender	Toddler	Kids	Kids
Size	XS/S	S/M	M/L
Shoe Size: US	10-12	13-1	2-4
Shoe Size: EURO	27-29	30-32	33-35
Shoe Size: CM	16.5-18.5	19.5-20	20.5-22
Shoe Size: CHINA	165-185	195-200	205-220

Helmets

Size	S	M	L	XL
Global Fit (cm)	52-55	56-59	60-62	63-64
Round Fit (cm)	55-57	57-59	59-61

Gloves

Men's / Unisex	XXS	XS	S	M	L	XL	XXL
Hand Circumference (in)	6.5	7	7.5	8	8.5	9	9.5
Hand Circumference (cm)	16.5	18	19	20.5	21.5	23	24
Hand Length (in)	6.75	7	7.25	7.5	7.75	8	8.5
Hand Length (cm)	17	18	18.5	19	19.5	20.5	21.5
Women's	XXS	XS	S	M	L	XL	XXL
Hand Circumference (in)		6	6.5	7	7.5	8
Hand Circumference (cm)		15	16.5	18	19	20.5
Hand Length (in)		6.5	6.75	7	7.5	8
Hand Length (cm)		16.5	17	18	19	20.5

Socks

Size	XS	S	M	L
Shoe Size: US Men's		5.5-7.5	7.5-10.5	10.5-13.5
Shoe Size: US Women's	4-6.5	7-8.5	9-13	14
Shoe Size: EURO	34-37	37-40.5	40.5-43.5	43.5-46.5
Shoe Size: CM	21.5-23.5	23.5-25.5	25.5-28.5	28.5-31.5
Shoe Size: CHINA	215-135	235-255	255-285	285-315

Size	S/M	M/L
Shoe Size: US Women's	4-7	7-10
Shoe Size: US Men's		5.5-8.5
Shoe Size: EURO	34-38	38-42
Shoe Size: CM	21-24	24-27
Shoe Size: CHINA	210-240	240-270

Snowboards

Board Size	80	90	100
Weight Range	25-50 lbs. / 11-23kg	25-50 lbs. / 11-23kg	40-55 lbs. / 18-25kg
Waist Width	178mm	179mm	188mm
Stance Location	0	0	0
Binding Sizes	Kids	Kids	Kids
Running Length	440mm	540mm	645mm
Sidecut Radius	2.9m	3.6m	4.2m
Sidecut Depth	8.4mm	10.2mm	12.3mm
Stance Width	305mm	330mm	355mm
Nose Width	194.7mm	199.5mm	212.6mm
Tail Width	194.7mm	199.5mm	212.6mm
Effective Edge	480mm	580mm	685mm

Board Size	125	130	135	140	145
Weight Range	70-100 lbs. / 32-45kg	70-100 lbs. / 32-45kg	80-110 lbs. / 36-50kg	90-120 lbs. / 41-54kg	100-150 lbs. / 45-68kg
Waist Width	235mm	238mm	240mm	242mm	245mm
Stance Location	0	0	0	0	0
Binding Sizes	Kids/S (Re:flex only)	S (Re:flex only)	S (Re:flex only)	S (Re:flex only)	S/M (Re:flex only)
Running Length	870mm	900mm	950mm	1000mm	1050mm
Sidecut Radius	5.9m	6.1m	6.4m	6.8m	7.1m
Sidecut Depth	16.1mm	16.6mm	17.5mm	18.5mm	19.4mm
Stance Width	430mm	455mm	455mm	455mm	480mm
Nose Width	267.1mm	271.2mm	275.1mm	278.9mm	283.8mm
Tail Width	267.1mm	271.2mm	275.1mm	278.9mm	283.8mm
Effective Edge	910mm	940mm	990mm	1040mm	1090mm

Board Size	140	145	150	155	160	165	155W
Weight Range	80-120 lbs. / 36-54kg	100-150 lbs. / 45-68kg	120-180 lbs. / 54-82kg	120-180 lbs. / 54-82kg	180-260 lbs.+ / 82-118kg+	180-260 lbs.+ / 82-118kg+	120-180 lbs. / 54-82kg
Waist Width	240mm	245mm	251mm	257mm	264mm	270mm	267mm
Stance Location	-25	-25	-25	-25	-25	-25	-25
Binding Sizes	Men's S, Women's M	Men's S/M, Women's M/L	Men's M/L, Women's L	Men's L, Women's L	Men's L, Women's L	Men's L, Women's L	Men's L, Women's L
Running Length	950mm	1000mm	1050mm	1100mm	1150mm	1200mm	1100mm
Sidecut Radius	6.5m	6.8m	7.1m	7.5m	7.8m	8.2m	7.5m
Sidecut Depth	17.5mm	18.4mm	19.3mm	20.2mm	21.2mm	22.1mm	20.2mm
Stance Width	480mm	505mm	530mm	560mm	560mm	560mm	560mm
Nose Width	282.5mm	289.3mm	297.2mm	305.0mm	313.8mm	321.7mm	315.0mm
Tail Width	267.5mm	274.3mm	282.2mm	290.0mm	298.8mm	306.7mm	300.0mm
Effective Edge	996mm	1046mm	1096mm	1146mm	1196mm	1246mm	1146mm

Board Size	150	154	156	158	162	154W	158W	162W	166W	170W
Weight Range	120-180 lbs. / 54-82kg	120-180 lbs. / 54-82kg	150-200 lbs. / 68-91kg	150-200 lbs. / 68-91kg	180-260 lbs.+ / 82-118kg+	120-180 lbs. / 54-82kg	150-200 lbs. / 68-91kg	180-260 lbs.+ / 82-118kg+	180-260 lbs.+ / 82-118kg+	180-260 lbs.+ / 82-118kg+
Waist Width	248mm	250mm	252mm	254mm	256mm	258mm	262mm	264mm	266mm	270mm
Stance Location	-12.5	-12.5	-12.5	-12.5	-12.5	-12.5	-12.5	-12.5	-12.5	-12.5
Binding Sizes	M	M/L	M/L	M/L	L	L	L	L	L	L
Running Length	1085mm	1125mm	1145mm	1165mm	1205mm	1125mm	1165mm	1205mm	1245mm	1285mm
Sidecut Radius	7.4m	7.6m	7.8m	7.9m	8.2m	7.6m	7.9m	8.2m	8.4m	8.7m
Sidecut Depth	20.0mm	20.8mm	21.1mm	21.5mm	22.2mm	20.8mm	21.5mm	22.2mm	23.0mm	23.7mm
Stance Width	505mm	530mm	530mm	560mm	560mm	530mm	560mm	560mm	560mm	560mm
Nose Width	288.1mm	291.5mm	294.3mm	297.0mm	300.5mm	299.5mm	305.0mm	308.5mm	312.0mm	317.4mm
Tail Width	288.1mm	291.5mm	294.3mm	297.0mm	300.5mm	299.5mm	305.0mm	308.5mm	312.0mm	317.4mm
Effective Edge	1135mm	1175mm	1195mm	1215mm	1255mm	1175mm	1215mm	1255mm	1295mm	1335mm

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