Batten Pocket

A reinforced sleeve sewn into a sail to hold a batten, which helps maintain the sail’s shape.

A batten pocket is an essential feature of many sails, particularly on mainsails and some headsails, where it serves to hold battens securely in place. Battens are long, thin strips made from materials such as fibreglass, carbon fibre, or wood, which are inserted into these pockets to stiffen the sail and improve its aerodynamic shape. The primary function of battens is to help the sail maintain a flatter, more efficient profile, especially when sailing upwind, and to reduce fluttering or distortion in the sailcloth. 

Batten pockets are typically reinforced with extra layers of fabric to prevent wear and tear from the constant pressure and movement of the battens. They are usually positioned horizontally or diagonally across the sail, depending on the design and the desired sail performance. The length and number of battens vary depending on the sail’s size and the type of boat. In some cases, the battens may extend the full length of the sail (full battens), while in others, they may only cover a portion of the sail (partial battens).

The design and construction of batten pockets are critical for ensuring that the battens remain securely in place during sailing, as loose or poorly fitted battens can cause damage to the sail or reduce its performance. Properly maintained batten pockets contribute to the longevity and efficiency of the sail, making them a key component in sail design.