Shopping cart

  • No products in the cart.
FREE U.S. SHIPPING $50+ / Lifetime Guarantee

Delta Mug

Not your ordinary mug


Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 14ºF means a man should be comfortable down to air temperatures of 14ºF. The same bag will also have a Comfort limit, in the realm of 27°F, so a woman would be comfortable down to an air temperature of 27ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.



The Delta™ Mug is a lightweight, durable camping mug that features our patented Protex hex pattern base, which reduces weight and disperses surface temperature.  

Learn more about camping cooking with Delta HERE

Dishwasher Safe


    • Protex™ hex pattern base disperses heat
    • BPA-free
    • Hard wearing
    • Measurement increments on the inside

    Technical Features

    BPA Free

    These products are all Bisphenol-a (BPA) free, which means you can have peace of mind while eating and drinking from these products. BPA free means that they're a bit more environmentally friendly too!

    Protex™ Base

    This hexagonal pattern on the base of all our original Delta series dinnerware helps to disperse heat comfortably so you can hold onto your bowl, plate, or mug no matter how hot its contents are.

    Tech Specs

    Product Details

    Best Use
    Backpacking, Camping, Overland, Drinking
    BPA Free Food-grade glass-reinforced polypropylene
    Dishwasher & Microwave Safe
    4.25 in / 11 cm
    3.75 in / 9.5 cm
    16 oz / 473 ml
    2.2 oz / 62 g


    Scroll To TopScroll To Top