Description of Exped Coupler Kit The Coupler Kit is a pair of straps that binds two mats together preventing them from sliping apart. They fit all Exped mats and are easy to adjust using the velcro strips. The included packsack is fixed to the straps and can not be lost. Features: Weight: 70 g / 2.5 oz, Packsack 15 g / 0.5 oz Packed: 12 x 8 x 1 cm / 5 x 3 x 0.4“