Synthetic gut are made with nylon. Synthetic gut is a good all round string with good playability and durability and today's synthetic gut strings have greatly improved in there feel and all at a great price.
Prince Synthetic Gut w/duraflex £18
Very similar to natural gut and known as a soft string with a lot of comfort and feel but without a centre core the durability is much reduced. The string is great for players suffering from arm problem.
Babolat Excel £25
Wilson Sensation £20
Head Perfect Power (squash) £17
Ashaway Super Nick XL (squash) £25
Yonex BG65 (badminton) £22
Yonex BG65Ti (badminton) £22
Yonex BG80 (badminton) £24
The ultimate in playability, feel, power, control and comfort and the best string at holding tension so just the ultimate string, that everyone should have at least tried once.
Babolat VS Team £48
A very durable string designed to provide control, durability and spin to advanced players. Polyester enables advanced players to maintain control on their aggressive play and also producing a great level of spin.
MSV Focus Hex £18
Wlson Poly Pro £18
Babolat RPM Blast £25
Luxilon Alu Power / Alu Power Rough (Big Banger) £28
Solinco Hyper G £22
Yonex Poly Tour Pro £20
SUPPLY YOUR OWN STRING:
Tennis / Squash £12
Lower tension equals more power
Higher tension equals more control
Fewer strings more power and more spin
Thinner string more power and more spin
Softer strings vibrate less
More strings more control
Polyester strings lose tension quickest followed by multifilaments then synthetic gut, while natural gut is the best at holding tension the longest
Heavy rackets equal more power, vibrate less and have a bigger sweetspot
Stiffer rackets equal more power and will absorb more shock
Larger head rackets equal more power and are more stabile and larger sweetspot
Longer rackets equal more power