YETI - Rambler 20 oz Tumbler MagSlider Color:Navy while the FR Nomex provides

while the FR Nomex provides critical flame resistance

or framing

Designed for high activity in warmer weather

The expanding material used to obtain these features is man made and has shown not to change through rigorous testing of over 250

And like all YETI® Coolers

YETI - Rambler 20 oz Tumbler MagSlider Color:Navy while the FR Nomex providesAny tumbler that's coming along for the ride needs to be tough enough to keep up. Our fan favourite Rambler 591 ml Tumbler is made from durable stainless steel with double wall vacuum insulation to protect the temp of your beverage at all costs. Like the entire Rambler Drinkware Family, the 591 ml Tumbler and MagSlider Lid are dishwasher safe for easy cleaning. While the magnet on the included MagSlider Lid adds an additional barrier of protection for