Even though it is two ounces heavier, we think the Western Mountaineering Summerlite is a much better choice for ultralight backpackers who prefer a hooded mummy. It is warmer for side and tummy sleepers, and it features a smooth operating, durable zipper. You'll find several more very light hooded mummies in our review of Backpacking Sleeping Bags.
The Speed 32 sleeping bag seems to have been discontinued - we are still waiting on confirmation from Mountain Hardwear. You may still be able to find this bag on sale at some online retailers. Check out our complete Ultralight Sleeping Bag Review for more options!