The last thing you need to do is reach for your Spare-Air and it is no longer attached to you! Safety leash keeps you from losing the Spare-Air. Safety Leash allows you to quickly unleash the Spare-Air to give it to another diver. This is a necessity for all Spare-Air users. Safety Leash works with all Spare-Air styles and sizes. Leash will extended out to 4' (122 cm) for comfortable buddy breathing. Leash has barrel lock slide fastener on nylon loop on one end of the coiled leash with a corrosion proof plastic snap gate clip on opposite end.