Are you serious? What I recommend is that you step away from me as rapidly as you can, before I whack you in the head with a snowball. Poor you! Going to the nasty Caribbean where it聮s relatively dry and night temperatures are usually 75! Oh, the humanity!
Cocoon Silk Mummy Liner

I mean, obviously there won聮t even be a need for a sleeping bag. Really all you need to take is a cotton or silk sleep sack. Cocoon聮s Cotton Mummy Liner ($20; cocoonusa.com) gives you just a touch of warmth and something to hang onto in the night, and it weighs next to nothing. The silk version costs $50 and is a little warmer. Honestly, it and a T-shirt ought to suffice even if a 聯cold snap” sends temps plummeting into the聴gasp!聴mid-50s.
If you decided you could use something warmer, then consider REI聮s Kilo Flash +40 bag ($179; rei.com). As the name implies, it聮s a sleeping bag rated to 40F or warmer. It weighs just over a pound and packs down to nothing. You could unzip it and use it as a comforter, too.
Now go away.
You聮ve seen our picks for 2007 Gear of the Year, and now the entire
国产吃瓜黑料 Summer Buyer聮s Guide is online. Check out this year聮s more than 400 must-have gear items, including sleeping bags.