* Free standard P&P worth £4.99 in England, Scotland & Wales. Excluding Northern Ireland, Scottish Highlands & islands which will be charged at £13.11. Delivery to Isle of Wight will be charged at £21.85. Next day, Saturdays and express deliveries will cost more, please ask our customer service team for a quote. These web pages are intended for UK/ EU residents only. †Inspiratory Muscle Training (IMT) is a technique used to correct or increase performance of the muscles involved in inhalation. Positive Expiratory Pressure (PEP) devices help inhaled air get behind the mucus in the lungs and helps keep the airways open.