These pajamas are made to be comfortable and super-tough. Our customers were telling us that they used them for all kinds of things, from karate and jiu-jitsu practice to kettlebell workouts. The waistband is made from a super-high-modulus elastic that helps keep the pants solidly wrapped around your waist, but if you need more, there's also belt loops! Kettlebell Pajamas are made from a hemp/cotton blend that gets softer the more you wash them. The front pockets have more than enough room for phones and etc. Whether you're the type of person who rolls out of bed and jumps into a kettlebell workout, or you just want a tough pair of pajamas you can lounge around in all day, Torsaga Kettlebell Pajamas can stand up to whatever you throw at them.