UltraBoost 21

Running

Footwear

Men's Neutral

Medium

Adidas Men's UltraBoost 21 Black/Silver/Yellow

+1

61% off

Adidas

UltraBoost 21

$69.99 compare at $180.00

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Color:

Size: Size Chart

Men's Tops

	Chest	Waist	Hip
XS (30/32-32/34)	31-33"	27-29"	32-34"
S (34/36-36/38)	34-37"	30-32"	35-37"
M (38/40-40/42)	37-40"	32-35"	37-40"
L (42/44-44/46)	40-44"	35-39"	40-44"
XL (46/48-48/50)	44-48"	39-43"	44-48"
2XL (50/52-52/54)	48-52"	43-47"	48-51"
3XL (54/56-56/58)	53-58"	48-53"	51-56"

Men's Bottoms

	Waist	Hip	Inseam
XS	27-29"	32-34"	31.9"
S	30-32"	35-37"	32.1"
M	32-35"	37-40"	32.3"
L	35-39"	40-44"	32.5"
XL	39-43"	44-48"	32.7"
2XL	43-47"	48-51"	32.5"
3XL	48-53"	51-56"	32.3"

Men's Shoes

US	UK	EU	JP (CM)
4	3.5	36	220
4.5	4	36.7	225
5	4.5	37.3	230
5.5	5	38	235
6	5.5	38.7	240
6.5	6	39.3	245
7	6.5	40	250
7.5	7	40.7	255
8	7.5	41.3	260
8.5	8	42	265
9	8.5	42.7	270
9.5	9	43.3	275
10	9.5	44	280
10.5	10	44.7	285
11	10.5	45.3	290
11.5	11	46	295
12	11.5	46.7	300
12.5	12	47.3	305
13	12.5	48	310
13.5	13	48.7	315
14	13.5	49.3	320
14.5	14	50	325

Women's Tops

	US sizing	UK sizing	Bust (In.)	Waist (In.)	Hip (In.)
XXS (0-2)		0-2	28.7-29.9"	22.4-23.6"	32.3-33.5"
XS (4-6)	0-2	4-6	30-32"	24-26"	34-36"
S (8-10)	4-6	8-10	33-35"	27-28"	37-38"
M (12-14)	8-10	12-14	36-37"	29-31"	39-41"
L (16-18)	12-14	16-18	38-40"	32-34"	42-43"
XL (20-22)	16-18	20-22	41-43"	35-37"	44-46"
2XL (24-26)	20-22	24-26	44-46"	38-41"	47-49"

Women's Bottoms

	US sizing	UK sizing	Waist	Hip	Inseam
XXS (0-2)		0-2	22.4-23.6"	32.3-33.5"	30.5"
XS (4-6)	0-2	4-6	24-26'	34-36"	30.7"
S (8-10)	4-6	8-10	27-28"	37-38"	30.9"
M (12-14)	8-10	12-14	29-31"	39-41"	31.1"
L (16-18)	12-14	16-18	32-34"	42-43"	31.3"
XL (20-22)	16-18	20-22	35-37"	44-46"	31.5"
2XL (24-26)	20-22	24-26	38-41"	47-49"	31.7"

Women's Shoes

US	UK	EU	JP (CM)
5	3.5	36	220
5.5	4	36.7	225
6	4.5	37.3	230
6.5	5	38	235
7	5.5	38.7	240
7.5	6	39.3	245
8	6.5	40	250
8.5	7	40.7	255
9	7.5	41.3	260
9.5	8	42	265
10	8.5	42.7	270
10.5	9	43.3	275
11	9.5	44	280
11.5	10	44.7	285
12	10.5	45.3	290
12.5	11	46	295
13	11.5	46.7	300

Boys Apparel

	S	M	L	XL
Size	8-10	10-12	14-16	18-20
Height	50-57"	58-63"	64-67"	68-72"
Weight (lbs)	59-86	87-114	115-137	138-150

Girls Apparel

	S	M	L	XL
Size	7-8	10-12	14	16
Height	50-53"	54-57"	58-60"	61-63"
Weight (lbs)	53-69	70-84	85-99	100-110

Kids Shoes

US	UK	EU	JP
10.5	10	28	175
11	10.5	28.5
11.5	11	29	180
12	11.5	30	185
12.5	12	30.5
13	12.5	31	190
13.5	13	31.5	195
1	13.5	32
1.5	1	33
2	1.5	33.5
2.5	2	34
3	2.5	35
3.5	3	35
4	3.5	36	200
4.5		36.7	225
5
5.5
6

Infant Apparel

	Age	Height	Weight (lbs)
3 mos	0-3 mos	Up to 23"	7-10
6 mos	3-6 mos	23-25"	10-13
9 mos	6-9 mos	25-28"	13-17
12 mos	12 mos	28-31"	17-22
18 mos	18 mos	31-33"	22-25
24 mos	24 mos	33-35"	25-28
2T	2	33-35"	29-33
3T	3	35.5-38"	29-33
4T/4	4	38.5-41"	34-38
5	5	41.5-44"	39-44
6	6	44.5-45.5"	45-49
6X-7	6-7	46.5"	50-54
7X	7	47-49"	54-59

Infant & Toddler Shoes

US	UK	EU	JP
0	0
1	1
2	1
3	2
4	3	19	120
5	4	20
5.5	5	21
6	5.5	22	130
6.5	6	23	140
7	6.5	23.5	145
7.5	7	24
8	7.5	25	150
8.5	8	25.5	155
9	8.5	26
9.5		26.5	160
10		27	165

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Description

Prototype after prototype. Innovation after innovation. Testing after testing. The pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return.

Sock-like fit
Lace closure
adidas Primeknit+ upper
Textile lining
Supportive heel counter
Boost midsole
Weight: 340 g
Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm)
Stretchweb outsole with Continental Rubber
Primeblue
Imported

Best For
Road
Drop
10 mm
Structure
Neutral
Weight
11.9 oz / 340 g
Widths
Regular

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