Pattern development is a cornerstone of sportswear design, bridging the gap between creative concepts and functional garments. In Kenya’s vibrant fashion industry, where sportswear is gaining popularity both in urban centers and sporting institutions, mastering pattern drafting ensures designers produce apparel that fits well, performs optimally, and meets market expectations. This chapter focuses on the technical skills required to develop garment pattern pieces specific to sportswear, emphasizing precision, fabric behavior, and ergonomic considerations vital for activewear.

2.1 Develop garment pattern pieces

Pattern pieces are the individual shapes cut from fabric and sewn together to create a complete garment. Developing these pieces for sportswear requires understanding the unique demands of movement, breathability, and durability. Kenyan fashion designers working with clients such as university sports teams or corporate wellness programs must tailor patterns not only for fit but also for performance attributes, ensuring comfort and style coexist.

Principles of Pattern Development for Sportswear

Creating pattern pieces for sports garments involves several foundational principles that distinguish activewear from general fashion apparel. These principles ensure that the final product supports physical activity without compromising on aesthetic appeal.

Fabric Behavior and Stretch Allowance

Sportswear fabrics often include elastane or spandex blends to provide stretch. Patterns must accommodate this stretch to maintain shape and comfort during movement. Designers add specific stretch allowances to pattern pieces, varying by fabric type and garment function, to prevent restrictive wear or distortion.

Movement and Ergonomics

Patterns must be drafted considering the body’s range of motion. For example, armholes and crotch seams are shaped to reduce tension during activities like running or jumping. Ergonomic pattern shaping includes features such as gussets or articulated joints to enhance flexibility.

Fit and Body Contours

Sportswear demands a close but comfortable fit to avoid excess fabric that may hinder performance. Pattern development incorporates precise body measurements and ease allowances that differ from casual wear, often using contouring darts and princess seams to hug the body’s natural shape.

Seam Placement for Durability and Comfort

Strategic seam placement reduces chafing and increases garment strength. Flatlock seams or bonded seams are common in sportswear, and pattern pieces must be designed to accommodate these seam types, often requiring adjustments in seam allowances.

Design Lines and Style Integration

While functionality is paramount, sportswear must also appeal visually. Pattern pieces integrate design lines that enhance aesthetics, such as color blocking or paneling, which also serve functional purposes like ventilation zones or reflective strips for safety.

Tools and Equipment for Pattern Making

Precision and efficiency in pattern development are achieved through the use of specialized tools. Kenyan fashion designers benefit from both traditional and digital tools, adapting to available resources and project requirements.

• Pattern paper must be handled carefully to avoid tears and creases that can distort measurements during cutting.
• French and hip curves require steady hands and practice to achieve smooth, accurate lines critical for proper fit.
• Digital tools like CAD software enable easy corrections and scaling, increasingly popular among Kenyan designers working with export markets.

Methods of Drafting Pattern Pieces

Pattern drafting can be approached through various methods, each suited to different stages of design and production. Understanding these methods helps designers choose the most effective technique for their sportswear projects.

Flat Pattern Drafting

This traditional method starts with a basic block pattern fitted to the body measurements. Modifications are made by adding or subtracting sections to create the desired style. It is highly effective for creating precise sportswear patterns that require exact fit and functional details.

Draping

Draping involves pinning fabric directly onto a dress form to shape the garment. This method allows designers to see how fabric behaves in three dimensions, essential for sportswear where stretch and movement are factors. Draping is particularly useful for experimental designs or custom fittings.

Computer-Aided Design (CAD)

CAD systems allow for digital drafting of pattern pieces with high accuracy and repeatability. Kenyan designers engaged in large-scale production or export benefit from CAD for faster development, grading, and storage of patterns. Integration with cutting machines streamlines manufacturing.

Pattern Making from Existing Garments

This reverse-engineering technique involves deconstructing a well-fitting sports garment to create new patterns. It is practical for replicating or modifying successful designs, especially when working within limited timeframes or budgets.

Adjustments and Modifications in Sportswear Patterns

Once initial pattern pieces are drafted, adjustments ensure the garment meets both functional and aesthetic requirements. Modifications are common in sportswear to accommodate different body shapes, fabric characteristics, and design features.

Grading for Size Variations

Grading involves scaling the base pattern up or down to fit a range of sizes. Sportswear brands in Kenya serving diverse populations must grade patterns carefully to maintain fit consistency across sizes, considering variations in body proportions.

Adding Design Features

Incorporating elements such as pockets, zippers, ventilation panels, or reflective trims requires modifying pattern pieces. These additions must not interfere with garment performance or comfort, demanding precise alterations.

Ease Adjustments

Ease is the difference between body measurements and garment measurements. Sportswear patterns often have less ease for a snug fit but may require extra ease in certain areas like shoulders or knees to facilitate movement.

Seam Allowance Customization

Depending on the sewing technique and fabric type, seam allowances may be increased or decreased. For example, stretch fabrics often require smaller seam allowances to reduce bulk, while reinforced sportswear may have larger allowances for durability.

Fit Testing and Pattern Correction

Prototyping and fit sessions with models or athletes provide feedback that guides pattern corrections. Kenyan designers collaborating with sports teams or schools use this iterative process to refine patterns before final production.

Chapter Summary

This chapter focused on the comprehensive process of developing sports garment patterns, starting with the creation of individual pattern pieces that form the foundation of the garment's design. Emphasis was placed on clear pattern instructions to guide accurate assembly and production. The use of folds was explained as a technique to create symmetry and shape in the garment, while notches and balance marks were highlighted as essential for aligning pieces correctly during sewing. Understanding straight grains was crucial for cutting fabric in a way that preserves garment shape and durability. The chapter also covered the importance of pattern size to ensure proper fit, as well as the role of style numbers in identifying design variations. Determining the number of pieces to be cut and marking the centre back and centre front were discussed as key steps in pattern layout. Additionally, naming the pattern and including seam allowances were shown to facilitate production and finishing. Construction lines and scale were explained as tools for precision and proportional accuracy, culminating in the final step of cutting the sports garment pieces according to the developed patterns.