“i took a chance on this 7mm bootie. never had one that think before. my feet get cold and feel like wood blocks! so yeah, 7mm good! warmer! last longer out there in nor cal cold! i am getting use to the thickness on the board feel. but i like it. trade off for warmth is better than feeling extra under foot. so if you get cold block feet ,.....get the 7mm! also..... the top strap on ankle is rad! keeps tons of water from getting in. win!”