Custom Longline Sports Bra with Square Neck and Wide Underband

This longline sports bra combines a square neckline with a wide underband. During development, we focus on neckline stability, underband tension, and lower-edge fit. These details affect how well the bra keeps its shape and stays in place during movement.

Product Specifications

Specification Details
Fabric 82% Nylon / 18% Lycra Interlock
Neckline Square Neck
Length Longline
Underband Wide Underband
Stretch 4-Way Stretch
Size Custom Size Range & Grading

Square Neckline Stability

A square neck can open outward or become wavy when the neckline is too wide or the strap position is incorrect. We develop the neckline width, depth, and strap position together. For lower or wider necklines, we also check coverage during arm raises and forward bends.

Wide Underband Support

A wider underband does not automatically provide more support. We adjust band width, negative ease, and fabric recovery together so the band stays flat against the ribcage. Too much tension can make the lower edge roll, while too little can allow the bra to shift upward during movement.

Longline Fit

A longline bra cannot simply use a standard sports bra pattern with extra length added. The ribcage and lower opening need their own fit adjustment. We grade the body length and lower opening by size to reduce tightness, flaring, or rolling at the bottom edge.

Custom Options

  • Square-neck width and depth
  • Strap width and position
  • Longline body length
  • Underband width
  • Back construction
  • Removable cup construction
  • Logo placement
  • Labels and packaging