3 sentences

1. 他穿着一套新买的运动服。

   tā chuān zhe yī tào xīn mǎi de yùn​dòng​fú.

   He is wearing a newly bought tracksuit.

   Source: Dong Chinese Dictionary

2. 他走进更衣室，换上了运动服。

   tā zǒu​jìn gēng​yī​shì, huàn​shàng le yùn​dòng​fú.

   He went into the locker room and changed into sportswear.

   Source: Dong Chinese Dictionary

3. 这种运动服采用了透气性良好的合成纤维面料。

   zhè zhǒng yùn​dòng​fú cǎi​yòng le tòu​qì​xìng liáng​hǎo de hé​chéng xiān​wéi miàn​liào.

   This sportswear is made from a synthetic fiber fabric with good breathability.

   Source: Dong Chinese Dictionary