18mm Nylon Supertape Over-the-Shoulder Slings. Nice to have a few of these. They lie flatter across the shoulder than tied slings, and are quite a bit less expensive than spectra slings. Nylon absorbs more water than Dynex, but lasts longer. Makes a good bunny strap.

Weight: 39 grams or 1.36 ounces 

10mm DYNEX Over-the-Shoulder Slings made from UHMPE webbing. Nice to have a few of these. Smaller and lighter, and non-absorbant. More expensive, and possibly not as durable. But, deluxe!!

Weight: 19 grams or 0.7 ounces