Blankets were traditionally made of wool, while sheets were made of cotton which is less irritating to the skin. These days, artificial fibers are frequently used for both. Duvets vs Comforters: http://www.ajmoss.com/blog/2006/06/01/co... How to fit a Duvet Cover: http://www.bbc.co.uk/dna/h2g2/brunel/A68...
An easy swim burns around 500 calories an hour, while a vigorous effort can reach up to 700 calories an hour. Swimming exercise provided workout for lower body, upper body, core, and back will all be worked and strengthen during a good swimming workout, you can go for 4 to 6 days swimming workout.
Based on the the list of 16 swimming activities, shown below, the average calories burned for an average male, weighing 190 pounds (86 kg) is 328 Calories for 30 minutes of swimming. The average burnt for an average female, weighing 163 pounds (74 kg) is 282 Calories for 30 minutes of swimming.