QuiltLock System
![QuiltLock System](http://seatosummit.eu/cdn/shop/articles/Quilt_Lock_System_d2897312-1fc8-43ed-bf12-f58b40df4bea.png?v=1653006455&width=1200)
The QuiltLock system uses the snap locks located at the shoulder and foot end of Sea to Summit sleeping bags plus the quilt footbox / quilt straps to secure a quilt to the sleeping bag.
This adds thermal performance and versatility to your sleep system: your integrated quilt now works for ultralight summer adventures and turns your three-season bag into a four-season sleep system.