This shrink wrap effect is a visual impact muscle building technique which allows for maximum muscle tone. The trick is to get to a low body fat percentage and maintain for a 4-6 weeks. This gives your skin a chance to tighten up to your smaller body size.
After your skin has tightened up you want to start a high volume weight training routine aimed at sarcoplasmic growth. This will allow you to add some quick muscle size in a few short weeks. The result will be the shrink wrap effect which is when your skin is shrink wrapped around your muscles.