The idea behind the Senso-Sleeves is great, the execution not so much. To use these you put them on like you would a condom. The theory is that they will add some heightened sensation, and a extra inch or so to your length. These would be ideal for beginners, as the sensations that we thought would be there just aren't. We were worried there might be too much stimulation, so our disappointment level was extreme when we found it was just like your basic condom. These generally would be used as a couple, but if a guy wanted to use them solo, he could as well.

The sleeves are made of TPR, which rates at a six on the Eden's Safety Scale. They are semi-porous, which means they can not be sterilized, so extra care must be taken during cleaning. The material is made to stretch, and over time it may not bounce back to its pre-stretched size. If using lube, you should only use water-based lubricants with these sleeves. The texture has a great look to it, but is flimsy and was very hard to feel. Upon opening the package, there was a rubbery odor to them. Ours still has the order, though it's not as bad. This could be partially because they are still in the packaging and were only out the few times we tried them out.

Unstretched, the sleeves measure approx five inches in length, and are maybe one inch across. The packaging states they will stretch and fit up to 7 7/8 inch in girth, but we did not test them to this extent as we were not positive that they wouldn't rip. There is nothing even partially solid at the end that would make this an extension. The end is bulbous with a small piece of material on the end, not really sure what the point of it being there is. I am of average size, and the fit and feel was good -- not to tight, or too loose. As previously mentioned, they go on like a condom. The only difference is that you stretch it, and that you don't unroll it.