Portable Kettlebell SandbagTM - Small Yellow 0-15 lbs / 7kg 0-15lb/7kg capacity (dry sand) Handmade of Ballistic Nylon: Puncture, tear, abrasion resistant Use just about any filler: dry or wet sand, pebbles, gravel, dirt, mud... Webbing reinforced: 1,500lb+ tensile strength Made in the U.S.A