The PKB was designed by John Rarity, Product and Content Manager for Xpedition Tech and SEALFIT grad. Whether on a cross-country motorcycle ride or multi-day off-road expo, there was always plenty of space but no easy access to weights. We tried packing a 20 kilo kettle bell when traveling by car, but forget about it on a motorcycle. Eventually, the added weight and hassle of securing a 40+ pound missile was too much of a headache, and so the PKB Sandbag was born. It's simple, durable and easy to pack. The PKB can be packed with sand, dirt, rocks - you name it - and it's easy to empty when done. Simply rinse and re-pack, or just re-pack and head-out to your next stop.