I Belong Here Sweatshirt

Social Goods x Proof

I Belong Here Sweatshirt

$80.00
Pre-order
Size:

Size
Color:Natural
Quantity:

Preorder Note: Will ship in time for Mother's Day.

The Pulitzer and Tony Award–winning PROOF is back on Broadway reawakening a story of brilliance and belief after the discovery of a revelatory mathematical proof. 

The new Social Goods x PROOF collaboration, a creative play on the Pythagorean theorem, supports the Year of Math to bring the power and  beauty of mathematics directly to local communities, schools and libraries through the accessible, high-impact programming.

  • Soft, plush sponge fleece raglan crewneck sweatshirt
  • 52/48 airlume combed and ring-spun cotton
  • Machine wash
  • Unisex sizing and runs large, if looking for a more snug fit we recommend sizing down
  • Printed in USA

Benefits: The 2026 Year of Mathematics Campaign, a national celebration designed to reignite America’s appreciation for math by bringing programming directly into our communities. 

Size Charts

We include fit information on every product page. For our unisex sweatshirt and t-shirt fits, please see the size guides below:

Unisex
T-shirt Size		 Chest Chest to Fit Length
XS 16 1/2'' 31" - 34" 27"
S 18" 34" - 37" 28"
M 20" 38" - 41" 29"
L 22" 42" - 45" 30"
XL 24" 46" - 49" 31"
2XL 26" 50" - 53" 32"
3XL 28" 54" - 57" 33"
4XL 30" 58" - 61" 34"

Unisex
Sweatshirt Size		 Chest Chest to Fit Length
XS 18 1/4'' 31" - 34" 26 1/2"
S 19 1/4" 34" - 37" 27 3/4"
M 20 1/4" 38" - 41" 29"
L 21 1/4" 42" - 45" 30"
XL 22 1/2" 46" - 49" 31"
2XL 22 3/4" 50" - 53" 32"

For our youth and toddler sweatshirt and t-shirt fits, please see the size guides below: 

Youth 
Sweatshirt Size		 Width Length Sleeves
YS (6-8) 16" 19 3/4" 23 1/2"
YM (10-12) 17" 21 1/4" 26 1/2"
YL (14-16) 18" 22 1/3" 27 3/4"

Toddler 
Sweatshirt Size		 Width Length Sleeves
2T 13" 15" 11 3/4"
3T 13 1/2" 16" 12 1/4"
4T 14" 17" 13 3/4"

Youth 
T-shirt Size		 Fits
Sizes
YS 6-8
YM 10-12
YL 14-16 

Toddler 
T-shirt Size		 Fits
Weight
2T 30-33 lbs
3T 33-36 lbs
4T 36-40 lbs

Size Charts

We include fit information on every product page. For our unisex sweatshirt and t-shirt fits, please see the size guides below:

Unisex
T-shirt Size		 Chest Chest to Fit Length
XS 16 1/2'' 31" - 34" 27"
S 18" 34" - 37" 28"
M 20" 38" - 41" 29"
L 22" 42" - 45" 30"
XL 24" 46" - 49" 31"
2XL 26" 50" - 53" 32"
3XL 28" 54" - 57" 33"
4XL 30" 58" - 61" 34"

Unisex
Sweatshirt Size		 Chest Chest to Fit Length
XS 18 1/4'' 31" - 34" 26 1/2"
S 19 1/4" 34" - 37" 27 3/4"
M 20 1/4" 38" - 41" 29"
L 21 1/4" 42" - 45" 30"
XL 22 1/2" 46" - 49" 31"
2XL 22 3/4" 50" - 53" 32"

For our youth and toddler sweatshirt and t-shirt fits, please see the size guides below: 

Youth 
Sweatshirt Size		 Width Length Sleeves
YS (6-8) 16" 19 3/4" 23 1/2"
YM (10-12) 17" 21 1/4" 26 1/2"
YL (14-16) 18" 22 1/3" 27 3/4"

Toddler 
Sweatshirt Size		 Width Length Sleeves
2T 13" 15" 11 3/4"
3T 13 1/2" 16" 12 1/4"
4T 14" 17" 13 3/4"

Youth 
T-shirt Size		 Fits
Sizes
YS 6-8
YM 10-12
YL 14-16 

Toddler 
T-shirt Size		 Fits
Weight
2T 30-33 lbs
3T 33-36 lbs
4T 36-40 lbs