Tech Pack for Stretchable Leggings

I need a detailed tech pack for childrens activewear including leggings, shorts and crop tops .

Key requirements:
- Design specifications for leggins, shorts and crop tops
- Ensure fabric is stretchable, supportive and breathable
- Include construction details, materials, measurements, and any necessary design elements

Ideal skills and experience:
- Experience in creating tech packs for activewear
- Strong understanding of activewear functionality and design
- Proficiency in textile properties, specifically stretchable fabrics

Please provide samples of previous similar work.