Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Easy Tennis Ball / tennis ball

Easy Tennis Ball
Easy Tennis Ball

Excessively weared tennis ball causes a lot of problems, which detrimentally influence the feel of playing tennis by cutting its bounce and faster its speed. Worse stll, excessively weared ball may lead to injury such as tennis elbow because of the loss of buffer. It is difficult for people to tell whether the tennis ball has enough thickness of wool felt to play. Easy tennis ball provides a easy way to tell when the ball is time to discard, which yet again to contribute to ecological and resource protection.


University of Edinburgh

University of Edinburgh

Mingwei Zhang,
University of Edinburgh

Dongyun Yang,
University of Edinburgh

Huachao Gong,
Tsinghua University